Icon for a portion of a display screen



FIG. 1 is a front view of the icon for a portion of a display screen; and,

FIG. 2 is a second embodiment of the icon of FIG. 1.

The broken lines showing of the display screen and various regions therein are for the purpose of illustrating environmental structure and unclaimed portions and form no part of the claimed design. 

The ornamental design for an icon for a portion of a display screen, as shown and described. 